java HTTP 错误 503：无法访问 /。原因服务不可用
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HTTP ERROR 503: can not access /. Reason Service Unavailable
提问by asdfkjasdfjk
My code is in github
我的代码在github
https://github.com/shiblybcc/blog-aggregator
I have just created a spring framework project. This is my web.xml file code
我刚刚创建了一个 spring 框架项目。这是我的 web.xml 文件代码
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>Course Rating</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
After I run my jetty server this works perfect and show the content of index.jsp file. But if I add following code in the web.xml file
在我运行我的码头服务器之后，它完美运行并显示了 index.jsp 文件的内容。但是如果我在 web.xml 文件中添加以下代码
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.html</url-pattern>
<url-pattern>*.htm</url-pattern>
<url-pattern>*.json</url-pattern>
<url-pattern>*.xml</url-pattern>
</servlet-mapping>
I get the error
我收到错误
HTTP ERROR: 503
Problem accessing /. Reason:
Service Unavailable
I am following a tutorial and they are doing the same. I don't understand what is wrong with my code. Thanks in advance.
我正在学习教程，他们也在做同样的事情。我不明白我的代码有什么问题。提前致谢。
采纳答案by asdfkjasdfjk
After whole day research I found the solution here Getting Error scanning file when running jetty 9 on java 8 using the maven jetty plugin
经过一整天的研究，我在这里找到了解决方案， 使用 maven jetty 插件在 java 8 上运行 jetty 9 时获取错误扫描文件
Also I updated jetty, maven and tomcat. My current pom.xml
我还更新了码头、Maven 和 tomcat。我当前的 pom.xml
<build>
<plugins>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<dependencies>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>5.0.3</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm-commons</artifactId>
<version>5.0.3</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.3</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
After updating everything, it is working fine now.
更新一切后，它现在工作正常。
回答by Arpit Aggarwal
Ok, understood, what is happening when you are calling localhost:8080/index.htm, servlet name "dispatcher" got executed and as there is no mapping for index.html exist, you will not be able to see the index.html page.
好的，明白了，当您调用 localhost:8080/index.htm 时发生了什么，servlet 名称“dispatcher”被执行，并且由于不存在 index.html 的映射，您将无法看到 index.html 页面.
To make it work, you have to put little more efforts.
为了让它发挥作用，你必须付出更多的努力。
1). Put your index.html under WEB-INF folder.
1）。将您的 index.html 放在 WEB-INF 文件夹下。
2). Create Controller:
2）。创建控制器：
package com.test.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.ModelMap;
@Controller
@RequestMapping("/index")
public class IndexPageController{
@RequestMapping(method = RequestMethod.GET)
public String showIndexPage(ModelMap model) {
return "index";
}
}
3). Create mvc-dispatcher-servlet.xml as below and put it under WEB-INF folder :
3）。如下创建 mvc-dispatcher-servlet.xml 并将其放在 WEB-INF 文件夹下：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<mvc:annotation-driven></mvc:annotation-driven>
<context:component-scan base-package="com.test.controller" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".html" />
</bean>
</beans>
4). Edit your web.xml as:
4）。将您的 web.xml 编辑为：
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
